/Engine/Source/Runtime/GeometryCore/Public/Spatial/BlockedLayout3.h
Spatial decomposition of a region of 3d ijk space into 3d cubes of size BlockSize (per side). This class gives a consistent translation between locations in 3d lattice space and blocks of a spatial decomposition; it is independent of any sort of data that you might want to associate with those locations. See BlockedDenseGrid3.h for usage.
template<int32 BlockSize_> class TBlockedGrid3Layout
FVector3i
BlockDimensions
FVector3i
Dimensions